Why is your furnace blowing cold air?

There could be several reasons why your furnace is blowing cold air:

  1. Thermostat Settings: Check if your thermostat is set to heat mode and at the desired temperature. Sometimes, the settings might be incorrect, causing the furnace to blow cold air.

  2. Dirty Air Filter: A clogged or dirty air filter can restrict airflow, causing the furnace to overheat and shut off the burner, leading to the circulation of cold air.

  3. Pilot Light or Ignition Issues: If you have a gas furnace, the pilot light or ignition system might be malfunctioning, preventing the furnace from producing heat.

  4. Faulty Thermocouple or Flame Sensor: A malfunctioning thermocouple or flame sensor can cause the gas supply to shut off, preventing the burner from igniting and producing heat.

  5. Issues with the Blower Motor: Problems with the blower motor or its controls can result in the circulation of unheated air.

  6. Blocked Air Vents or Ducts: Blocked vents or ducts can obstruct airflow, causing the furnace to distribute cold air.

  7. Fuel Supply Problems: For gas furnaces, issues with the gas supply, such as low gas pressure or a closed gas valve, can prevent the furnace from producing heat.

It's essential to address these issues promptly, but if you're unsure or uncomfortable troubleshooting, it's best to contact a professional HVAC technician like,Glors Heating and Air Conditioning Inc. to inspect and repair the furnace.